asOBF

alpha

One-('OneOrTwoSidedBounds'==1) or Two-sided bounds('OneOrTwoSidedBounds'==2) are used

OneOrTwoSidedBounds

This alpha spending function approximates alphaStar-function O'Brien and Fleming-type.

methods

The computations are done with the alpha spending approach. Therefore
	interim analyses need not to be equally spaced, and their number need not to be specified in advance. 
	It is appropriate for any trial based on normally distributed test statistics with independent increments,
	survival studies, and certain longitudinal designs.
	Among other things it computes boundaries, power, drift and confidence intervals.
	The package provides this in a GUI and user has option of graphical output of the results
	and saving them into .html files.

asOBF: approximates O'Brien and Fleming-type

Description

Usage

Arguments

Value

See Also

Examples